This is a weird take when you just lost to a team that had no chance to win in games it wasn't hitting like 45% of its 3s.But playing an offense that is so heavily reliant on 3s does open the possibility of a cold spell that sinks your season. D’Antonis teams were always vulnerable in the same way. They (the Celtics)had absolutely no other way to score so had to go down with the ship.
In truth I wonder if what we call mental toughness issues or their inability to sustain success is just the natural variance of being such a 3 point oriented team. The numbers are what they are and they will produce wins over 82 games but in the short haul of a 7 game series we keep needing the full 7 and playing with fire because it seems to be impossible to just shoot to your averages every night against playoffdefenses
If anything, the Cs problem was that they couldn't generate enough quality 3s against Miami, not that they shot too many.